Process of printing



Sept. 28 1926. 1,601,491

s. BERGMAN PROCESS OF PRINTING Filed August 6. 1924 3 Q Addihbnal 60/0219 W Embossed Pa oer' INVENTOR 6 1711.449 W441,

A ATTQRNEY Patented Sept. 28, 1926.

UNlTED- STATES PATENT OFFICE.

SIMON IBERGMAN, OF NEW YORK, N. Y.,'.A SSIG NOR TO BERGMAN PROCESS PAPER MILLS, ING, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PROCESS OF PRINTING.

Application filed August 6, 1924. SeriaI No. 730,377.

The invention relates to a process of producing pattern effects on paperor like material, and more particularly to a process for producing a desired pattern or design on wall coverings, or other material, a surface of which is to be covered with the coloring material.

According to my invention the material on which the print is to be formed is first embossed in a desired manner to produce, for example, a desired pattern or design in relief. The material on which the print is to be formed comprised fibrous or cellular material preferably paper, cardboard or the like, which may be referred to generally as felted cellulose material.

Having embossed the paper or other material, it is covered with a thick gelatinous coloring material which is preferably of a semi-transparent character, and which is of such a nature that it will not adhere to a hard smooth roller, or other hard: non-porous surface used for exerting pressure in forming the print. The paper or other base material is positioned against a resilient backing, and considerable pressure exerted against the covered surface of the paper. The result ofthis operation is to force the thick gelatinous coloring material into the body of the paper to some extent; also, the pressure being applied uniformly over the surface of the paper, the coloring material upon the raised portions of the paper will be pressed aside to some extent and into the relatively depressed portions, so that after the application of pressure the coloring material will appear to a less depth on the high spots or portions of the paper than in the relatively depressed spots or portions. I have found that this results, even though the pressure applied somewhat irons out the raised design which was embossed on the paper.

The result in any case is the production of a shaded print with lighter shades corresponding to the raised portions and darker shades corresponding to the depressed portions of the embossed material. this being most markedly true when the coloring material used is of a somewhat transparent character.

Preferably the pressure is applied by passing the paper or base material in a continuous web between a resilient backing roll and a smooth-surfaced hard printing or pressure-applying roll, the coloring material being continuously fed to a desired depth onto the surface of the paper before the paper enters into the ni of the rolls.

din object of the lnvention is the pro- VlSlOIl of an improved process of the character referred to above. The invention consists in the process of printing and in the various steps and combinations of steps paratus by which the printing step ma be effected, in accordance with a form 0 the process which at the present time is considered desirable.

Referring to the drawings, the material 4, on which the print is to be made, is shown as a short section of a roll of paper. This material is preferably paper, cardboard or the like, preferably of a somewhat porous and absorbent character. As a preparatory step this paper is embossed to provide a desired pattern or design which may be produced in relief upon one surface of the paper, as indicated at 10 in Fig. 1. If, however, the design is to appear in a darker shade than the remaining surface of the paper, the design would be depressed relatlve to the remaining surface 'of the paper instead of raised.

The aper having been suitably embossed, its sur ace is covered with the coloring material to a depth sufficient to cover the raised portions of the embossing, after which the print is made. In the form of method illustrated, the paper is drawn from a roll 5 and is then assed about a roller 2 which is provided with a somewhat resilient surface such as rubber, to act as a backing roller. The paper passes from roller 2, be-

tweenthe latterand the printing or ":pressure-applying roller 1 which has a hard even non-porous surface, such as a metalsurface. The bearings 3 of roller 1, or if desired, of roller 2, or of both rollers, are adjustable in position for the purpose of adjusting the pressure to be exerted upon the paper and the coloring material thereon.

The coloring material may be placed in a tank 6 above the rollers and fed therefrom through an outlet 7 upon the paper at or slightly above the nip of the rollers, that is, the line in whichlgreatest pressure is exerted by the rollers upon the paper and coloring material between them. The coloring material may be fed in any desired manner upon the paper and the feed may be so regulated as to insure the coloring material feeding onto the paper to a desired depth. As illustrated the coloring material .may feed under its own pressure onto the paper, and tank 6 may be kept filled to a desired depth to insure the proper feed.

The coloring material employed is, as stated, of a thick gelatinous or jelly-like nature, this coloring material also being of such a character that it will not adhere. to the surface of the printing roller 1. The coloring material is preferably of. the char- 'acter of that described and claimed in a copending application of Sixten I. Jonsson, printing color composition and Inethodof forming same, Serial Number 730,390,filed August 6, 1924. This coloring material also preferably is of a somewhat transparent character so that the high spots of the embossed paper, on which there is a reduced quantity of coloring material in the final print, will sltow through the coloring material to some extent in the final print to produce amore markedly lighter shade. This may be accomplished by utilizing certain aniline or other suitable colors in the coloring composition. I have found thatsuch coloring matter is especially adapted to the above described process of producing colored pattern effects on paper, due to the fact that its gelatinous and non-adhesive properties enable it' to be uniformly displaced fromthe raised portions, giving clean, clear-cut uniform high and low light eflectsi. e., light and dark shaded portions without any streakiness or other imperfections.

As an example of the coloring material referred to, as disclosed in said J onsson application, starch, water, and lye may be mixed cold to form a thick gluey paste, as by adding together water, 104 parts, by weight, potato starch, 9 parts, and mixing therewith 4 parts of a saturated water solution of caustic soda lye. This is partly neutralized as by adding about one part of 7 sulphuric acid. A color solution is then separately formed, as by mixing water, 10 parts, borax, one part, and a desired aniline color, lto 2parts. composition is now mixedwlthten One part of the color parts of the base composition or paste, resulting'in the non-adhesive, thick gelatinous composition having the character described above.

If desired, one or more colors may be ap plied to the printing side of the paper before it is introduced between the rolls 1 and 2. An arrangement for this purpose is shown in Fig. 2 of the drawings, comprising a roller 8 pressing against the printing side of the paper wound around the roller 2, and transmitting color to thepaper from the trough 9 in which it is pitrtly submerged, such an arrangement, however, not being essential to the present process.

Considerable pressure will be produced upon the covered surface of the paper by roller 1, as the paper is continuously progressed between the two rollers. This pressure will, of course, be applied before the coloring material has hardened upon the paper, and as shown it is applied immediately. The coloring material will to some extent be pressed aside from the high points of the paper and into the relatively depressed .por-

tions, and will be somewhat pressed into the paper, on account of the absorbent or porous character of the paper or other base, the thick ,gelatinous character of thecol ring material, and the fact that the-paper is backed by the resilient roller 2. The thickfind this action as described to take place even. though the raised portions of the paper are slightly flattened out during the. passage through the rolls.

It. should be understood that the invention is not limited strictly to the exact,details which have been particularly described, but that a considerable'scope of equivalents is included within the invention, the nature of the invention being indicated by the appended claims.

Having thus described my invention, I claim as. new. and desireto secure by Letters Patent, is:

1. Process of printing designs on paper or like material, which consists in applying colorin matter to a surface of the material, which has been suitably embossed, and exerting pressure onthe embossed material by a yieldable member at its b'ack'and a hard smooth surfaced member at its face, the pressure being sufiicient to displace some of the coloring matter from the raised portions of the embossed material so as to produce what a shaded print with lighter shades corresponding to the raised portions and darker shades corresponding to the depressed portions of the embossed material.

2.. Process of producing designs on a web of paper or like material, which consists in applyin a thick gelatinous coloring matter to a sur ace of the material, which has been suitably embossed, and then passing the embossed web between a ieldable roll at its back and a roll with a ard smooth surface at its face, and exerting sufiicient pressure upon the material by such rolls to displac some of the coloring matter from the raise portions of the embossed web and produce a shaded print with' lighter shades corresponding to the raised portions and darker shades corresponding to the depressed portions of the embossed material.

3. Process of producin designs onv web paper or like material W ich comprises as a step applying a thick gelatinous coloring matter to a surface of said web which has been embossed, and passing the embossed Web between ayieldable roll at its back and a'roll with a hard smooth surface at its face, and exerting sufficient pressure upon the Web by such rolls to displace some of the coloring matter from the raised portions of the embossed Web and produce a shaded print with lighter shades corresponding to the raised portions and darker.shades corresponding to the depressed portions of the embossed web.

4. A process of printing desi s on a Web of fibrous or cellular mate'ria which has been embossed in a desired manner, which consists in covering a surface thereof with a thick gelatinous coloring material of a character such as to be non-adhesive to a hard non-porous surface, to a depth sufficient to cover the raised portions of the Web, positioning the web against a resilient backing, and applying considerable pressure against the covered surface of the web, beforethe coloring material has hardened, by application of a smooth hard non-porous surface to which said colorin material will not adhere, to produce a shat ied print with lighter shades corresponding to the raised portions and darker shades corresponding to the depressed portions of the embossed material.

5. A process of printing designs on a web of absorbent felted cellulose material which has been embossed in a desired manner, passing the same continuously between a resilient backing roller and a smooth even-surfaced roller, adjusted to exert considerable pressure upon the web, and feeding a thick gelatinous coloring material upon the face of the Web adjacent to the smooth even-surfaced roller, prior to the entrance of the web between the nip of the rolls, to co er the surface of the web to a depth sufficient to cover the raised portions of the web, to produce a shaded print with lighter shades corresponding to the raised portions and darker shades correspondin to the depressed portions of the embosse material.

In testimony -whereof I have signed my name to this specification.

SIMON BERGMAN. 

